I'm surprised no one has replied.
Here is my two penny worth.
Front Axle Swivel Ball Assembly Type with Bearings Top and Bottom
S/S FTC5366
Axle Codes :- 61L 61S 63L 64L
Fits:-
Defender From Vin LA930456
Discovery 1 1989 - 1998
Range Rover Classic 1985 - 1994
If in doubt I would phone Paddocks they are very helpful and not condescending like some I know.
Pete.